Arturo has completed 27 math problems, which is 75% of the assignment. How many problems total did he have to complete? I need help!

You have $600,000 saved for retirement. your account earns 5.5% interest. how much, to the nearest dollar, will you be able to pull out each month, if you want to be able to take withdrawals for 20 years?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.